Loans (TDR Number Of Contracts Modified And Recorded Investment) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) contracts	Sep. 30, 2017 USD ($) contracts	Sep. 30, 2018 USD ($) contracts	Sep. 30, 2017 USD ($) contracts
Financing Receivable, Recorded Investment [Line Items]
Additional Specific Reserves Related To Troubled Debt Restructuring	$ 150,000	$ 0	$ 160,000	$ 290,000
Troubled Debt Restructuring, Classification removed	$ 200,000		$ 2,400,000	$ 0
Number of Contracts | contracts	106	139	289	325
Total Recorded Investment	$ 3,704,000	$ 4,938,000	$ 6,566,000	$ 10,765,000
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period	$ 1,112,000	$ 825,000	$ 1,290,000	$ 1,088,000
Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	0	0	0	1
Total Recorded Investment				$ 8,000
Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	8	14	16	25
Total Recorded Investment	$ 574,000	$ 1,415,000	$ 800,000	$ 4,169,000
Residential Real Estate Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	2	10	2	15
Total Recorded Investment	$ 304,000	$ 498,000	$ 304,000	$ 702,000
Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	4	5	17	24
Total Recorded Investment	$ 246,000	$ 417,000	$ 1,062,000	$ 1,669,000
Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	0	0	2	0
Total Recorded Investment			$ 12,000
Residential Real Estate Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	$ 336,000	$ 151,000	$ 453,000	$ 216,000
Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	10	4	18	16
Total Recorded Investment	$ 469,000	$ 168,000	$ 860,000	$ 529,000
Construction Real Estate Commercial [Domain]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	0	0	1	0
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	3	3	10	9
Total Recorded Investment	$ 1,154,000	$ 1,455,000	$ 1,859,000	$ 2,320,000
Residential Real Estate Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	8	4	17	7
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Contracts | contracts	71	99	206	228
Total Recorded Investment	$ 621,000	$ 834,000	$ 1,216,000	$ 1,152,000
Accruing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	897,000	2,061,000	2,043,000	3,608,000
Accruing [Member] | Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	0	0	0	0
Accruing [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	22,000	400,000	208,000	400,000
Accruing [Member] | Residential Real Estate Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	55,000	144,000	55,000	144,000
Accruing [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	0	211,000	90,000	746,000
Accruing [Member] | Construction Real Estate - Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	0	0	12,000	0
Accruing [Member] | Residential Real Estate Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	336,000	110,000	437,000	175,000
Accruing [Member] | Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	453,000	123,000	735,000	478,000
Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment		974,000	447,000	1,525,000
Accruing [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	31,000	99,000	59,000	140,000
Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	2,807,000	2,877,000	4,523,000	7,157,000
Nonaccrual [Member] | Construction Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment				8,000
Nonaccrual [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	552,000	1,015,000	592,000	3,769,000
Nonaccrual [Member] | Residential Real Estate Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	249,000	354,000	249,000	558,000
Nonaccrual [Member] | Residential Real Estate - Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	246,000	206,000	972,000	923,000
Nonaccrual [Member] | Residential Real Estate Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment		41,000	16,000	41,000
Nonaccrual [Member] | Residential Real Estate Home Equity Line Of Credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	16,000	45,000	125,000	51,000
Nonaccrual [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	1,154,000	481,000	1,412,000	795,000
Nonaccrual [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	590,000	735,000	1,157,000	1,012,000
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Recorded Investment	$ 0	$ 918,000	$ 200,000	$ 1,000,000